SMITHSONIAN 
HERPETOLOGICAL 
INFORMATION 
SERVICE 
The SHIS series publishes and distributes 
translations, bibliographies, indices, and similar 
items judged useful to individuals interested in the 
biology of amphibians and reptiles, but unlikely to be 
published in the normal technical journals. Single 
copies are distributed free to interested individuals. 
Libraries, herpetological associations, and research 
laboratories are invited to exchange their 
publications with us. 
We wish to encourage individuals to share their 
bibliographies, translations, etc. with other 
herpetologists through the SHIS series. If you have 
such items please contact George Zug for instructions. 
Contributors receive 50 free copies. 
Please address all requests for copies and inquiries 
to George Zug, Division of Amphibians and Reptiles, 
National Museum of Natural History, Smithsonian 
Institution, Washington, D.C. 20560, 00. SmA Please 
include a self-addressed mailing label with requests 
EDITOR’S NOTE 
Dowling’s classification of snakes differs substantially from the classification 
in common use. The use of Dowling’s classification in a SHIS "publication" does 
not represent advocacy, but our willingness to present divergent viewpoints. 
G. Zug, September 1988 
